well, you said you had AA, and he had A high, so it may have just looked like he was trying to bully the rest of the table if he was in that good shape. if you were just shoving any ol damn thing for all he knew, he may have thought he had a chance to dominate you too. i wouldn't have thought to report AA vs A6 all in big stack vs baby stack. i have reported a first to act on the river big stack FOLD...could have at least checked...to a shortstack, when the two had struck up a good ol buddy buddy conversation, followed by "oh i had nothin anyway, enjoy". shit tilted me. couple hands later, i'm dealt 26 of spades on my bb...everyone folds...at that point, the short stacker was the sb to me, he's just god awful. he limps in. he had 5d7s...so, i mean, if he'd shoved or something, i would have folded, but he calls...ok. the flop is 6x3s5s. he min bet whatever the blind was and with top pair, straight draw, flush draw, i just shoved, i had him covered, it was time to go right now if donkwad was gonna keep chipping him up...he calls for the rest of his chips...the turn and river don't help anybody and my top pair holds and he's gone. i still reported it...wasn't sour grapes or anything, i won...but it was fishy to me...they buddied up cause they both found out they could speak spanish...i speak spanish all right myself dammit, 62s man...hell of a hand.
but in that situation, yeah, he might have known he was shoving crap to isolate you with what he thought you were representing as power to give you a better chance, but i would have left you alone, at least you were all in. i can't report that. that move, may, in fact, have ended up keeping you from getting more chips, but we'll never know